#include <QCoreApplication>
#include <iostream>
#include <math.h>
using namespace std;
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    cout << "Vvedite radiys L"<<endl;
    int L;
    cin >>L;
{
    double L=(3.14*2*R) ;
    cout << "L"<<endl;
    cout <<L<<endl;

    double S=(3.14*(2*R)) ;
    cout << " S "<<endl;
    cout <<S<<endl;
}

        return a.exec();
    }

